⚡ Bolt: Optimize AST traversal memory allocation - #139
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Modified `_collect_return_paths` and `_assignment_callee` functions in `src/wardline/scanner/taint/variable_level.py` to accept `Iterable[ast.AST]` instead of `list[ast.AST]`. Also stopped using `list()` to eagerly evaluate `ast.iter_child_nodes()` to pass into the functions. Converting generator yields like `ast.iter_child_nodes` to lists eagerly uses unnecessary memory allocations, which can add up significantly during large ast analysis passes. Co-authored-by: tachyon-beep <544926+tachyon-beep@users.noreply.github.com>
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Pull request overview
This PR reduces peak memory usage during taint analysis by avoiding eager materialization of AST child-node iterators, and by broadening internal traversal helper signatures to accept generic iterables.
Changes:
- Updated
_collect_return_pathsand_assignment_calleeto acceptIterable[ast.AST]rather thanlist[ast.AST]. - Removed
list(...)wrapping aroundfunc_node.bodyandast.iter_child_nodes(...), passing iterables/generators directly. - Added a Jules “bolt” note documenting the optimization guidance for future changes.
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.
| File | Description |
|---|---|
| src/wardline/scanner/taint/variable_level.py | Avoids eager list allocations during recursive AST traversal by accepting/pass-through iterables. |
| .jules/bolt.md | Documents the project guidance to pass ast.iter_child_nodes directly to avoid allocations. |
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💡 What: Modified
_collect_return_pathsand_assignment_calleefunctions insrc/wardline/scanner/taint/variable_level.pyto acceptIterable[ast.AST]instead oflist[ast.AST]. Also stopped usinglist()to eagerly evaluateast.iter_child_nodes()to pass into the functions.🎯 Why: Converting generator yields like
ast.iter_child_nodesto lists eagerly uses unnecessary memory allocations, which can add up significantly during large ast analysis passes.📊 Impact: Expected reduction in peak memory usage during taint analysis, especially for complex ASTs.
🔬 Measurement: Verify by running the full test suite and observing lower memory consumption during large codebase analysis.
PR created automatically by Jules for task 5512015946659352799 started by @tachyon-beep